Steam-boiler.



N0. 866,291. PATENTED SEPT. 1'7, 1907.

K. HJMERK.

STEAM BOILER.

APPLICATION FILED P313526, 1901.

2 SHEETS-SHEET 1.

Witnesses L I 67W 1 Mi 77% THE NORRIS PETERS cm, WASHINGTON. 54 c PATENTED 'SEPT. 17, 1907.

K. H. MERK.

STEAM BOILER.

APPLIOAIION FILED mm. 26. 1907.

2 SHEETS-SHEET 2.

Inventor Witnesses THE uomzls PETERS c0. WeSHINGTON, a. c.

UNITED STATES PATENT OFFICE.

KARL I'I. MERK, OF HALENSEE, NEAR BERLIN, GERMANY.

' STEAM-BOILER.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed February 26, 1907. Serial No. 359,450.

.the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to tubular steam boilers in which the fire tubes are discontinuous and transverse of these tubes, located between their discontinuous portions, is a super-heating chamber through which super-heating tubes pass at right angles to the fire tubes.

Referring to the drawings in which like parts are similarly designated, Figure 1, is a longitudinal vertical section of alocomotive boiler provided with my invention. Fig. 2, is a vertical transverse section on the line A-A of Fig. 1. Fig. 3 is a partial longitudinal vertical section of a modification. Fig. 4, is a vertical transverse section of Fig. 3. Fig. 5, is a vertical transverse section showing the modified form of the steam superheating tubes, and Fig. 6, is a partial vertical longitudinal section of a further modification.

Referring more particularly to Figs. 1 and 2, a is a fire box, a fire tubes leading therefrom, e the superheating chamber, f the continuation of the fire tubes 0, and d the smoke box. The tubes 0 extend between the fire box a and the partitional flue sheet m that forms one end of the super-heating chamber e. n is a like partitional flue sheet in which the ends of tubes f are secured, the other ends being secured in the end flue sheet 0 of the boiler adjacent the smoke box (I. The direction of the furnace gases is indicated by the arrows 70.

b and b are the water spaces in the boiler, and g is a steam dome.

Horizontal flue sheets p and q extend between the flue sheets m and n, the super-heating chamber 6 being formed between the sides of the boiler, the flue sheets m and n and the horizontal super-heating steam tube sheets 10 and q. The super-heating tubes h are each secured at their lower ends to a flue sheet q, and extend through and are secured in the upper horizontal flue sheet p, their open upper ends extending above the sheet 10 and above the water level of the boiler. These steam tubes therefore stiffen plates 10 and g. In. the partitional flue sheets m and n are openings, or cut-away portions 7" and, s respectively, that are located above the sheet p so that there will be free circulation of water and steam through them from one side of the super-heating chamber e to the other, and over the plate p and between the tubes h. Thus the sheet p is continuously covered with water and forms a heating surface of the boiler.

Below the plate is a super-heated steam chamber 1' from which the steam is carried to its place of consumption so that the distance the steam will have to travel will be shorter than if it were drawn from a steam dome and the cooling thereof be lessened. I

Referring to the modification shown in Figs. 3 and 4 it will be seen that I have dispensed with the partitional flue sheets extending entirely across the boiler and have built the super-heater within the body of the boiler and either some or all of the fire tubes may pass therethrough. The fire tubes 0 and their continuations f are secured in the ends t and "u of the super-heating chamber 2, the lateral side walls 90 and y of said chamber being connected together by horizontal water tubes .2 passing between the vertical steam super-heating tubes h. These tubes 2 stiffen the sides as and y. The top and bottom flue sheets 1 and w for the super-heating tubes h, together with the side walls a: and y inclose the chamber 6, said tubes h projecting above the upper flue sheet 1 so as to extend above the water level in the boiler.

Below the super-heating chamber e is the superheated steam collecting chamber 1, and I have shown continuous fire tubes 0 extending therethrough. It may be desirable to have other continuous fire tubes extending from end to end of the entire boiler between the sides of the super-heating chamber e and the boiler shell, and these, I haveshown at c Fig. 4.

In Fig. 5, which is a section similar to Fig. 4, I have shown the super-heating tubes h as reversed or coiled pipes but set transverse or at right angles to the direction of the fire tubes.

In Fig. 6, which is a vertical longitudinal section similar to Fig. 1 the super-heated steam chamber '5 is located in the steam dome and the partitional flue sheetsm and n are not provided with the openings 1 and 8 but in lieu thereof, the two end sections of the boiler 17 and b, are connected by a water tube or tubes 2 extending between m and n near the bottom and through the super-heating chamber e while the steam spaces of the boiler above the water level in the two end sections thereof are connected by a steam tube or tubes 2 In this form I dispense with the lower super-heating flue sheet q and conduct the steam from the steam spaces of the respective end sections through reversing or worm tubes h whose entrances are secured in the plates m and a respectively. They then pass through the plate 1) and after several convolutions terminate in said plate and discharge in the space and dome 11 above it.

It will thus be seen that in all the modifications shown the super-heating chamber 6 is located between discontinuous fire tubes so that the hot gases from said tubes will be united in said chamber 6, and then continue on through the forward sections of the fire tubes; and further that the super-heating tubes no matter what their form are positioned at right angles to the fire tubes, and within the super-heating chamber e. It is of course obvious that the form of boiler can be altered. I have illustrated my invention as applied to a locomotive boiler, but any other suitable boiler may be provided with my improvements.

I claim 1. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber located between the sections of said tubes and superheating tubes passing through and supporting and stiffening the opposite walls of said super-heating chamber.

2. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber located between the sections of said tubes and vertical super-heating tubes in said super-heating chamber whose entrances extend above the water level of the boiler, and whose exits are located in the bottom plate of the super-heating chamber;

3. In a steam boiler, the combination with two boiler sections located Within the same cylindrical outer wall and separated each from the other by two flue sheets, a super-heating chamber located between the two flue sheets, and fire tubes in each boiler section, of steam Super-heat ing tubes located in the super-heating chamber at right angles to the fire tubes and means connecting the steam spaces of the boiler sections, said connecting means being located within the cylindrical boiler wall.

4. In a steam boiler, the combination with two end boiler sections located within a cylindrical outer wall and separated each from the other by two flue sheets, a super-heating chamber located between the two flue sheets, and fire tubes in each boiler section, of steam super-heating tubes located in the super-heating chamber at right angles to the fire tubes, and means connecting the water spaces of the boiler sections, said connecting means being located within the cylindrical boiler wall.

5. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber between the sections of fire tubes and below the water level, vertical super-heating steam tubes passing through the chamber horizontal water heating tubes passing through the cham' her at right angles to the fire tubes, and continuous fire tubes passing on the sides of the chamber throughout the boiler.

G. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber located between the sections of fire tubes and below the water level, vertical super-heating steam tubes having their receiving ends above the water level passing through the chamber, horizontal water heating tubes passing through the chamber at right angles to the fire tubes, and continuous fire tubes passing on the sides of the chamber throughout the boiler' 7. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber forming a prismatic box and located between the sections of fire tubes, vertical steam super-heating tubes passing through and stiffening the chamber, horizontal water heating tubes passing through and stiffening the chamber at right angles to the fire tubes, and continuous fire tubes passing on the sides of the chamber throughout the boiler, the top plate of the super-heating chamber being located below the lowest water level in the boiler and the entrances of the super-heating tubes being located over the highest level of the water overflowing the super-heating chamber.

8. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber between the sections of the lire tubes, super-heating steam tubes in said chamber whose entrance ends are located above the highest water level in the boiler and a super-heated steam collecting chamber separated from the steam super-heating chamber and located within the cylindrical boiler wall.

9. In a steam boiler, the combination with discontinuous fire tubes, of a super-heating chamber between the sections of the fire-tubes, steam super-heating tubes whose entrance ends are located in the steam space of the boiler and a super-heated steam collecting chamber located below the steam super-heating chamber and receiving the superheated steam from the super-heating tubes.

In testimony that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing witnesses.

KARL H. MERK.

Witnesses:

HENRY HASPER, WILLIAM MAYNER. 

